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January 27, 2026 

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PERSONALITY: A consistent pattern of behavior in certain situations. These behavioral tendencies are influenced by both hereditary and environmental factors resulting in individual characteristics. Marketing researchers look for certain personality characteristics that affect patterns of consumer buying behavior.

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FOUR-FIRM CONCENTRATION RATIO

The proportion of total output in an industry produced by the four largest firms in an industry. This is one of two common concentration ratios. The other is the eight-firm concentration ratio. Another related measure is the Herfindahl index. The four-firm concentration ratio is commonly used to indicate the degree to which an industry is oligopolistic and the extent of market control held by the four largest firms in the industry.

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APLS

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Today, you are likely to spend a great deal of time at a garage sale hoping to buy either an AC adapter for your CD player or storage boxes for your family photos. Be on the lookout for the last item on a shelf.
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This isn't me! What am I?

The wealthy industrialist, Andrew Carnegie, was once removed from a London tram because he lacked the money needed for the fare.
"Don't judge each day by the harvest you reap, but by the seeds you plant."

-- Robert Louis Stevenson, Author

MPS
Marginal Propensity to Save
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